Impeller



FIG. 1 is a front top right perspective view of an impeller showing my new design;

FIG. 2 is a bottom rear left perspective view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a cross-sectional view of the impeller taken along the line 9-9 shown in FIG. 7; and,

FIG. 10 is a cross-sectional view of the impeller taken along the line 10-10 shown in FIG. 7. 

CLAIM The ornamental design for an impeller, as shown and described. 